You can use a ServerAlias as mentioned, or you can set up a second virtual server entry for the www.jdcamp.org version.

I should mention that while ServerAlias is the built in function in Apache to do this, search engines often penalize you for having multiple domains or subdomains pointing to the same site, because of the abuse of this concept. Same goes for having mulitple domains subdomains that simply point to the same site.

Therefore, for search engine optimization purposes, it makes more sense to set up a second entry, and do a permanent redirect like this: